127 
mortem examinations made at Zambi no specimens of H. 
megastoma were found. His conclusion was that H. megastoma 
was either absent or very rare at Zambi. In his experiment 
he, therefore, deposited larvae of Musca domestica on a freshly 
volded mass of dung from a horse "known to be infected with 
H. muscae." When the adult flies hatched out they were found 
to be infected with larvae in a proportion of 70 per cent. 
became h 
to bite itself. The wound became transformed into a char- 
acteristic “summer sore." 
Discussion. 
i here can be no doubt that the etiology of the tumours 
ound in Southern Australia and of those found elsewhere, and 
larvae found 
e same. 
sores” appear to be identical with those found in 
